/*
 * Copyright 2022 lzhpo
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.lzhpo.sensitive.utils;

import java.util.Optional;
import javax.servlet.http.HttpServletRequest;
import lombok.experimental.UtilityClass;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

/**
 * @author lzhpo
 */
@UtilityClass
public class ServletContextUtil {

  /**
   * Get {@link HttpServletRequest}
   *
   * @return {@link HttpServletRequest}
   */
  public static HttpServletRequest getRequest() {
    return getRequestAttributes().getRequest();
  }

  /**
   * Get {@link ServletRequestAttributes}
   *
   * @return {@link ServletRequestAttributes}
   */
  public static ServletRequestAttributes getRequestAttributes() {
    return Optional.ofNullable(RequestContextHolder.getRequestAttributes())
        .filter(ServletRequestAttributes.class::isInstance)
        .map(ServletRequestAttributes.class::cast)
        .orElseThrow(() -> new IllegalArgumentException("Unable to get RequestAttributes"));
  }
}
